I don't know the man is cleaning the door.
A: when
B: where
C: what
D: who
A: when
B: where
C: what
D: who
举一反三
- I don’t know _____ he will be back home. A: who B: what C: when D: where
- I don’t know ____ I should say. A: what B: where C: who D: that
- I don't know ( )_ they have passed the exam. A: what B: if C: when D: where
- I don't know _______ she will come or not. A: what B: who C: when D: whether
- —Who is he Is he our new teacher —I’m sorry. I don’t know ______ and ______ he is. A: who; what B: who; how C: how; what D: where; how